I've been having more lag than usual for the past week, but its shown my connection as 'excellent' until today when it now says 'poor'. I rarely get lag, but now it's fairly regular, and enough to cause problems in combat.

I only noticed that it said it was poor because I was in the process of backing up my character and client data to do a full reinstall, hoping to fix it. I've already changed router settings and a number of other things. I've never had lag during big patches before, not even right when ShB went live. Clearly it's more than just a UI bug.